<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>椭圆形旋转效果</title>
  <style>
    * {
      margin: 0;
      padding: 0;
    }

    .grid-wrap {
      width: 100vw; 
      min-height: 100vh;
      display: grid;
      grid-template-columns: 200px 300px 200px;
      grid-template-columns: 200px 300px 200px;
      grid-template-areas:
        'nav head side'
        'nav main side';
    }

    .grid-wrap>div {
      background: #c47c7c5e;
      margin: 10px;
      /* grid-row: 1; */
    }

    .nav {
      grid-area: nav;
    }

    .head {
      grid-area: head;
    }
    
    .side {
      grid-area: side;
    }

    .main {
      grid-area: main;
      height: 20000px;
    }
  </style>
</head>

<body>
  <div class="grid-wrap">
    <div class="nav">1</div>
    <div class="head">2</div>
    <div class="side">3</div>
    <div class="main">内容</div>
  </div>
</body>

</html>